### Mathmetics

ISBT Mathmetics for all banking PO,Clerk,IBPS PO,Railway,SSC,IAS,OAS Exams

## Q1. | ## What is the value of 'P' , if the following equation has two equal roots ?^{2} - (P-2)x + 1 = 0 |

1) | P=6 or P=-2 | 2) | P=4 or P=-3 |

3) | P=6 or P=-3 | 4) | P=4 or P=2 |

5) | None of these |

**Answer : P=6 or P=-2**

**Explanation :**Here, a=4,b= - (P-2); c=1

Given, equation has equal roots,then D=0

b

^{2}- 4ac =0or p

^{2}+4 - 4p - 16 = 0or p

^{2}- 6p +2p - 12 =0or p(p-6) + 2(p-2) = 0

or p=6 or -2

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